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FOC | Family List | FOC Vol. 8 | Crassulaceae | Rhodiola

26. Rhodiola alsia (Fröderström) S. H. Fu, Acta Phytotax. Sin., Addit. 1: 121. 1965.

西川红景天 xi chuan hong jing tian

Caudex erect, long; persistent old flowering stems present. Flowering stems erect, pale red when dry, 15-20 cm, or 10-15 cm in female plants. Stem leaves alternate; leaf blade lanceolate to oblanceolate or oblong, 8-15 × ca. 2 mm, sparsely papillate, margin entire or usually apically few dentate, apex acute, finely papillate in female plants. Inflorescences cymose, 1.5-2 × 1.5-2 cm, slightly smaller in female plants. Flowers shortly pedicellate, bisexual or female (plants hermaphroditic or gynodioecious), unequally 5-merous, female ones 4-merous. Sepals reddish when dry, triangular-lanceolate, 2.4-3.5 mm, apex obtuse. Petals reddish when dry, oblong, 5-6 mm, apex obtuse, or slightly narrowed and shortly apiculate in female flowers. Stamens 10, to 7 mm; antepetalous ones inserted ca. 1 mm from petal base. Nectar scales subtransversely rectangular, or square in female flowers, apex ± emarginate. Carpels erect, suboblong, 5.6-6 mm. Follicles many seeded. Seeds subovoid, winged at both ends. Fl. Jul, fr. Aug.

* Rhododendron forests, rocky slopes; 3400-4800 m. NW Sichuan, Xizang, Yunnan.


1 Flowers bisexual or female (plants gynodioecious), 7-10 mm wide; flowering stems 2-6, to 20 cm   26a subsp. alsia
+ Flowers always bisexual (plants hermaphroditic), 5-7 mm wide; flowering stems many, fastigiate, 20-25 cm   26b subsp. kawaguchii

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